Improvement in sewing-machines



3 Sheets-Sheet 1. F. TOGGENBURGER.

I I Sewing Machine. No. 28,920. 'Patented June 26, 1860.

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3 Sheets-'Sheet 2.

F. TOGGENBURGER. Sewing Machine.

Patented June 26, 1860.

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3 Sheets-Sheet ,3. F. TOGGEN BU RGER.

Sewing Machine.

No. 28,920. i 1 Patented June 26, 1860.-

H w H Q N H H o mi -messes.-

UNITED STATES PATENT ()FFICE.

FR. TOGGENBURGER, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 28,920., dated June 26,1860.

.To all whom it may concern.-

Beit knownthat I, FREDERICK TOGGENBUR- GER, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Sewin g-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming a part of thisspecification, in

which- Figure 1 represents a side elevation of my invention partly insection. Fig. 2 is a front elevation ofthe same. Fig. 3 is an invertedplan of the same. Fig. 4is a detached enlarged view of the cap of theshuttle, together with the guardingtube of the lower thread. Fig. 5 isan enlarged central section of the revolving shuttle with the bobbin andcap. Fig. 6 is a detached elevation of the revolving shuttle. Fig. 7 isa detached face view of the cam for operating the shuttle-driver. Fig. 8is a side elevation of the same, and Fig. 9 is an end View of theshuttle-driver and shuttle.

This invention consists in the arrangement of a tube projecting from thecap of the shuttle,

in combination with a suitable loop or projection attached to the shieldto keep the lower thread in the proper direction and prevent it turning.I

To enablethose skilled in the art to make and use my invention, 1 willproceed to de scribe its construction and operation with reference tothe drawings.

A represents the table of the machine, supported by legs B, or in anyother convenient manner. On its under side is the grooved cam C, securedon the driving-shaft D for the pur pose of imparting motion to the armE, which connects, by means of alink, a, with the needlebar F, impartingto the same a rectilinear intermittent reciprocating motion. Saidneedlebar is guided in the frame G, that is attached to the end of thestandard H, which also sup ports the spool or bobbin I, carrying the upper or needle thread. This thread, in passing from the bobbin to theneedle, runs through a tube, J, attached to the side of the standard 11,and fitted with a small piece of oiled cloth or cotton, so as to make it(the thread) run easy through the material to be sewed.

The needle-bar is furnished on one side with a toothed rack, b, whichmeshes into a pinion, c, that is firmly secured to an axle, d, whichcarries aperforated lever, e.

f, exerts a certain tension on the lever e, hav- A helical spring,

ing a tendency to turn the same in the direc tion of the arrow marked onsaidlever in Fig. 2.- The needle-thread, after it has left the tube J,passes through a loop in the center of the axle d, and through severalof the perforations in the lever c. This lever serves to take in theslack and to tighten the stitch. It must be remarked that the toothedrack 1) extends over a short portion of the length of the stroke of theneedle-bar only so that the lever 6 remains stationary during aconsiderable portion of the up-and-down stroke of the needle. In orderto take in the slack, the lever e is turned up by a positive motionimparted to it by means of the rack and pinion at the time theneedle-bar ascends, and as the needle-bar descends the lever 0 turnsdown and remains in this position until the revolving shuttle has caughtinto the loop of the needle-thread and the needle-bar begins to ascendagain.

The driving-axle D carries a cog-wheel, K, which imparts motion to thetransverse axle g, and to a longitudinal shaft, h. The axle g has itsbearings in two pendants, '6, and se cured to it is a cam, K, thatactuates the feeder L. The shaft h extends to the front of the table A,and through the stationary disk Z, and secured to its end is the shuttledriver M. This shuttledriver consists of a cup, m, with two or moredogs, a, hinged to lugs 0, closebedisk Z, the shape of which isshown inFigs. 7

and 8. The cam-groove 1) has the shape of a circle, with about one thirdcut away, so as to form a straight line. As the rear ends of the dogs apass into the straight portion of the camgroove p, their hooked frontends are raised, and as they pass on the circular portion of thecam-groove their front ends are depressed.

The spherical cup on of the shuttlc-driver embraces a portion of therevolving shuttle N, a section of which, together with the bobbin 0 andcap 1?, is shown in Fig. 5. of the shuttle is indented with recesses q,corresponding in number to the dogs a, and sufficiently large to allowthe hooked ends of said dogs to penetrate into the same. By these meansthe rotary motion of the shuttle-driver is imparted to the shuttle, andthe dogs 01, together with the cam-groove p, are so ar- The surfaceranged that one of said dogs is in contact with the shuttle when theother one is released from the same by the action of the straightportion of the camgroove.

The shuttle N is provided with a hook, r, and it is covered by a cap, P,which fits into a circular aperture, .9, on the shield Q. A spring, 15,forces the cap, together with the shuttle, toward the slnittle-driver.The cap 1? is prevented from turning by a tubular projection, U, passingthrough a loop, 10, in the shield Q.

The bobbin 0 is arranged in the interior of the shuttle N, clearly shownin Fig. 5, and it fits loosely on the hub of the cap I, so that it canbe turned independently of the shuttle. The thread from the bobbin 0passes several times around loops a, arranged in the interior of the cap1?, in order to obtain the required tension, and from these loops itpasses out through the tubular projection c, as clearly shown in Figs. 4and 5.

The operation will be readily understood by referring to the drawings.The needle passes down through the material to be sewed and forms theloop in the usual manner. Thehook 'r of the shuttle catches into theloop, and it carries the needle-thread down with it,'forcing one. sideof the same down between the shuttle and the cap m of theshuttle-driver. As the thread arrives at one of the dogs a said dog israised by the action of the camgroove and the thread is allowed to passunder it. The other side of the loop passes over the cap P, and as theneedle rises it is drawn close up to the material to be sewed.

By thus passing around the shuttle N and cap 1? the needle-thread iscaused to embrace the lower thread as the same passes out of the tubularprojection 21, and the needle-thread is thereby prevented from slippingup through the material, and the stitch produced by my machine is equalin every respect to the stitch made by Wheeler & \Vilsons or Singerssewing-machines.

The work to make and fit my shuttle is con siderably less than thatrequired to make other revolving hooked shuttles-such as \Vheeler &W'ilsons-and its operation is quite as sure.

The needle -thread, by being kept well greased through the agency of theoiled cloth or cotton in the tube J, is made to pass easy through thematerial to be sewed, and the stitch can be drawn up perfectly tightwithout causing the thread to break; and by arranging the bobbin in theshuttle on the hub of the stationary cap 1?, whereby it is preventedfrom turning, the lower thread is always kept in good order frombeginning to end.

lVhatI claim as new, and desire to secure by Letters Patent, is

The arrangement of a tubular projection, r, on the cap P, in combinationwith a loop, 10, or its equivalent on the shield Q, constructed andoperating substantially as and for the purpose described.

FR. TOG GENBURGER.

\Vitnesses:

' H. iWInNsonING,

JOHN TAIUB.

